DE1480945C - Pneumatic vehicle tires with fine incisions in the tread - Google Patents

Description

1 sheet of drawings

Claims (1)

1 2 Two tires with different ab must that the driving behavior of the vehicle by Pneumatic vehicle tires with different running properties of its tires in the tread sensitive fine incisions, the fine incisions being adversely affected. The one with the wear and tear cuts within the elongated and gripping edges delimited by grooves Positive parts of the profile arranged and in longitudinal fine incisions also practice a favorable direction at most at its one end in grooves influence the anti-skid. The profile elements or the tire shoulder are freely tapering, limiting elements when starting up the Reida characterized in that the fine io fens initially run-cut sharp edges of the grooves (4) at their not freely expiring which more and more in the course of the operating time End through undercuts (7) on the profile; this adverse influence is caused by the The reason is that the length is greater than the length of the tire tread at the top of the profile have area. the gripping edges of the fine incisions 15 at least partially balanced. An exemplary embodiment is shown in the drawing provided, on which the invention is explained. It shows F i g. 1 shows a radial partial section through the zenith part of a pneumatic vehicle tire, In known pneumatic tires, the fine incisions run. 2 is a plan view of the running surface of the were free at their ends; which is at the bottom of the tire according to FIG. The tread 1 of the tire body 2 can be kung and the gradual increase in length. According to the execution of the fine incisions in the course of tire wear, for example, four rows of blocks with transversely extending are through the inclined side surfaces of 25 blocks 3, the transverse fine incisions 4 have the fine incisions penetrated profile elements with a width of about 0.5 mm and one inevitably caused, the effective positive part depth, which corresponds essentially to the height of the blocks 3 of the profile and thus the rigidity of the Laufstrei-. The length of the fine incisions 4, which is several times greater than the width of the fine incisions by fens with increasing wear of the tire. 30 cuts, depends essentially on the shape of the It is also known to make fine incisions in them receiving profile elements. The fine inside the positive parts of the section 4 delimited by grooves can, for example, also be arranged at an angle to the Rei profile; in this case, however, the circumferential direction of the fenestration has a shape deviating from the length of the fine incisions on the profile base, which is the same length, e.g. B. angled shape as on the profile surface, so that the 35 also have here. The fine incisions 4 have over their aforementioned disadvantage of increasing stiffening length and depth, practically the same width, the tread with increasing wear, but the length extension is in such a way, different that the length L is the basis of the fine invention the task is based on the fact that through cuts is significantly greater than the length Z in general, the fine incisions that are 4 ° rich in the surface of the running surface 5 are specially designed.
elastic deformability of the barrel strip and the uses of the in F i g. 1 and 2 to influence these forming tread elements, new tires approximately up to the dashed line 6 that they decrease with the wear of the tread, so the effective length of the does not change or at least does not change significantly. Fine incisions 4 to the dimension V, which is greater than this object is achieved by the length 1 in claim 45. It is useful to solve the inclination specified invention. To choose the undercut 7 so that the For example according to the invention at Neurei length L gradually increases, namely approximately the effective length of the fine incisions in the strip proportional to the wear of the barrel. The level determined by the tread 25 mm and the course of the undercut 7 should expediently be 30 mm when the tire is partially worn, 50 being continuous; the end face of the fine so that the cuts due to the wear of the tread 4 should not have any steps or other unconditionally enlarged positive part of the profile elements regularities, although it may be necessary and the associated effect of hardening may be necessary, for reasons to Verdieser profile blocks again or at least approximately avoidance of a notch effect in the corner points 8 is canceled again. This makes it possible to provide 55 fillets.